Pith Number

pith:VLU3OCCU

pith:2009:VLU3OCCU23OXHVNZA5SAN6OZNK

not attested not anchored not stored refs pending

Keck constraints on a varying fine-structure constant: wavelength calibration errors

(2) Univ. New South Wales, Australia, Australia), John K. Webb (2), Melbourne, Michael T. Murphy (1), Sydney, Victor V. Flambaum (2) ((1) Swinburne Univ.

arxiv:0911.4512 v1 · 2009-11-23 · astro-ph.CO · astro-ph.IM

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VLU3OCCU23OXHVNZA5SAN6OZNK}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-04T17:16:33.093002Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

aae9b70854d6dd73d5b9076406f9d96a91026e89a6fdd1c4763dcbfb14bf2873

Aliases

arxiv: 0911.4512 · arxiv_version: 0911.4512v1 · doi: 10.48550/arxiv.0911.4512 · pith_short_12: VLU3OCCU23OX · pith_short_16: VLU3OCCU23OXHVNZ · pith_short_8: VLU3OCCU

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/VLU3OCCU23OXHVNZA5SAN6OZNK \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: aae9b70854d6dd73d5b9076406f9d96a91026e89a6fdd1c4763dcbfb14bf2873

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5739e7d803dcc095fd0d16f5a508e1fe4761f21f9c64cb83083cac1016121150",
    "cross_cats_sorted": [
      "astro-ph.IM"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-11-23T23:56:56Z",
    "title_canon_sha256": "a66cf948e458fa42b6f3315ea4a05f5108871b8982839dd269edb2b93737fe58"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.4512",
    "kind": "arxiv",
    "version": 1
  }
}